var tooltip=function(){
    var id = 'tt';
    var top = 3;
    var left = 3;
    var maxw = 300;
    var speed = 10;
    var timer = 20;
    var endalpha = 95;
    var alpha = 0;
    var tt,t,c,b,h;
    var ie = document.all ? true : false;
    return{
	show:function(v,w){
	    if(tt == null){
		tt = document.createElement('div');
		tt.setAttribute('id',id);
		t = document.createElement('div');
		t.setAttribute('id',id + 'top');
		c = document.createElement('div');
		c.setAttribute('id',id + 'cont');
		b = document.createElement('div');
		b.setAttribute('id',id + 'bot');
		tt.appendChild(t);
		tt.appendChild(c);
		tt.appendChild(b);
		document.body.appendChild(tt);
		tt.style.opacity = 0;
		tt.style.filter = 'alpha(opacity=0)';
		document.onmousemove = this.pos;
	    }
	    tt.style.display = 'block';
	    c.innerHTML = v;
	    tt.style.width = w ? w + 'px' : 'auto';
	    if(!w && ie){
		t.style.display = 'none';
		b.style.display = 'none';
		tt.style.width = tt.offsetWidth;
		t.style.display = 'block';
		b.style.display = 'block';
	    }
	    if(tt.offsetWidth > maxw){tt.style.width = maxw + 'px'}
	    h = parseInt(tt.offsetHeight) + top;
	    clearInterval(tt.timer);
	    tt.timer = setInterval(function(){tooltip.fade(1)},timer);
	},
	    pos:function(e){
	    var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
	    var l = ie ? event.clientX + document.documentElement.scrollLeft : e.pageX;
	    tt.style.top = (u - h) + 'px';
	    tt.style.left = (l + left) + 'px';
	},
	    fade:function(d){
	    var a = alpha;
	    if((a != endalpha && d == 1) || (a != 0 && d == -1)){
		var i = speed;
		if(endalpha - a < speed && d == 1){
		    i = endalpha - a;
		}else if(alpha < speed && d == -1){
		    i = a;
		}
		alpha = a + (i * d);
		tt.style.opacity = alpha * .01;
		tt.style.filter = 'alpha(opacity=' + alpha + ')';
	    }else{
		clearInterval(tt.timer);
		if(d == -1){tt.style.display = 'none'}
	    }
	},
	    hide:function(){
	    clearInterval(tt.timer);
	    tt.timer = setInterval(function(){tooltip.fade(-1)},timer);
	}
    };
}();